Detect user shell as opposed to login shell.

Fixes #256.

bin/autojump

@@ -59,7 +59,7 @@ from autojump_utils import sanitize
 from autojump_utils import take
 from autojump_utils import unico
 
-VERSION = '22.0.1-beta'
+VERSION = '22.0.2-beta'
 FUZZY_MATCH_THRESHOLD = 0.6
 TAB_ENTRIES_COUNT = 9
 TAB_SEPARATOR = '__'

bin/autojump.sh

@@ -1,6 +1,16 @@
-# source autojump on BASH or ZSH depending on the shell
-
-shell=$(echo ${SHELL} | awk -F/ '{ print $NF }')
+# the login $SHELL isn't always the one used
+# NOTE: problems might occur if /bin/sh is symlinked to /bin/bash
+if [ -n "${BASH}" ]; then
+    shell="bash"
+elif [ -n "${ZSH_NAME}" ]; then
+    shell="zsh"
+elif [ -n "${__fish_datadir}" ]; then
+    shell="fish"
+elif [ -n "${version}" ]; then
+    shell="tcsh"
+else
+    shell=$(echo ${SHELL} | awk -F/ '{ print $NF }')
+fi
 
 # prevent circular loop for sh shells
 if [ "${shell}" = "sh" ]; then